Hydraulic Universal Testing Machine:
Introduction
A Hydraulic Universal Testing Machine (HUTM) is a sophisticated piece of equipment designed to evaluate the mechanical properties of materials under various types of stress. Widely used in industries such as manufacturing, construction, aerospace, and materials science, it can perform a range of tests-including tension, compression, bending, shearing, and torsion-on diverse materials like metals, plastics, composites, concrete, and textiles. Its versatility and precision make it indispensable for quality control, research and development, and compliance with industry standards.
Key Components
A typical Hydraulic Universal Testing Machine consists of several core components working in tandem to deliver accurate test results:
Load Frame: A robust, rigid structure (often made of high-strength steel) that supports the test specimen and withstands the forces generated during testing. It usually features a fixed crosshead and a movable crosshead, which adjusts to accommodate specimens of different sizes.
Hydraulic Actuator: The primary force-generating component, powered by a hydraulic pump. It drives the movable crosshead to apply controlled tension, compression, or other forces to the specimen.
Load Cell: A sensor that measures the force applied to the specimen with high precision, converting mechanical force into an electrical signal for digital display or data logging.
Extensometer: An instrument attached to the specimen to measure deformation (e.g., elongation in tension tests) accurately, ensuring precise calculation of properties like Young's modulus or yield strength.
Control System: A digital or computer-based interface that allows operators to set test parameters (e.g., force rate, displacement limit) and monitor real-time data. Advanced systems may include software for automated testing, data analysis, and report generation.
Working Principle
The operation of a Hydraulic Universal Testing Machine revolves around controlled force application and measurement:
Specimen Preparation: The material sample is securely clamped between grips or fixtures attached to the load frame, tailored to the test type (e.g., tensile grips for tension tests, compression platens for compression tests).
Test Setup: The operator configures test parameters (force, speed, duration) via the control system.
Force Application: The hydraulic actuator, driven by the pump, moves the crosshead to apply force to the specimen. The load cell continuously measures the applied force, while the extensometer tracks deformation.
Data Collection: Real-time data (force, displacement, stress, strain) is recorded and displayed. The machine may automatically stop when the specimen fails (e.g., fractures in a tension test) or when preset limits are reached.
Analysis: Post-test, data is analyzed to determine mechanical properties such as ultimate tensile strength, yield strength, compressive strength, elongation at break, or modulus of elasticity.
Applications
Hydraulic Universal Testing Machines are used across numerous sectors for critical evaluations:
Quality Control: Ensuring raw materials or finished products meet industry standards (e.g., testing steel bars for construction to confirm tensile strength).
Research & Development: Investigating new materials' behavior under stress to optimize their performance (e.g., developing high-strength alloys for aerospace).
Material Certification: Verifying compliance with regulations (e.g., testing automotive components to meet safety standards).
Failure Analysis: Determining why a material or product failed in service by replicating stress conditions in controlled tests.
Advantages
High Force Capacity: Hydraulic systems can generate extremely high forces (often ranging from tens to thousands of kilonewtons), making them suitable for testing heavy-duty materials like structural steel or concrete.
Precision: Advanced sensors and control systems ensure accurate force and deformation measurements, even at high loads.
Versatility: Adaptable to various test types with interchangeable fixtures, eliminating the need for multiple specialized machines.
Reliability: Robust construction and hydraulic technology ensure consistent performance over long periods, even in harsh industrial environments.
Software Interface
Specifications:
|
Product Model |
KASON HUT106W |
|
Number of columns |
6 (4 columns and 2 screws) |
|
Load Capacity |
1000kN |
|
Load Capacity |
100000kgf |
|
Calibration standard |
ISO 7500 |
|
Calibration standard |
Class 0.5 |
|
Testing load Accuracy |
±0.5% |
|
Load Measuring Range |
1%~100%FS |
|
Load Resolution |
1/500,000 of FS |
|
Accuracy of Stress Rate Control |
±0.5% |
|
Displacement resolution |
0.0025mm |
|
Displacement accuracy |
≤±0.5% of Indicating Value |
|
Deformation measuring range |
1%~100%FS |
|
Deformation resolution |
1/±500000FS of the max deformation |
|
Deformation accuracy |
≤±0.5% of Indicating Value |
|
Overload Protection |
≥5% of Full Range |
|
Main frame parameters |
|
|
Max. Tensile Testing Space |
820mm |
|
Max. Compression Testing Space |
690mm |
|
Distance between two columns |
560mm |
|
Column diameter |
Φ76mm |
|
Max. Piston stroke |
200mm |
|
Piston diameter |
Φ230mm |
|
Testing Speeds |
0~100mm/min |
|
Cross beam adjustment for max speed |
About 220 mm/min |
|
Cross beam moving motor power |
0.4KW |
|
Controls parameter |
|
|
Control mode |
Force closed loop control, deformation closed loop control, displacement closed loop control |
|
Force control controls the speed range |
0.001%~5%FS/s |
|
Force control speed control accuracy |
When 0.001% ~ 1% FS/s is better than ≤± 0.5%; When 1% ~ 5% FS/s better than ≤± 0.2% |
|
Force control hold accuracy |
±0.002%F.S |
|
Deformation control controls speed range |
0.001%～5%FS/s |
|
Deformation control accuracy accuracy |
When 0.001% ~ 1% FS/s is better than ≤± 0.5%; When 1% ~ 5% FS/s better than ≤± 0.2%; |
|
Deformation control hold accuracy |
≤±0.002％F.S |
|
Displacement control speed range |
0.1~100mm/min |
|
Displacement control speed accuracy |
≤±0.2% |
|
Displacement control hold accuracy |
≤±0.02mm |
|
Accessory parameters |
|
|
Clamping mode |
Built-in wedge type hydraulic automatic clamping |
|
Overall dimensions of the jaws |
100x100mm |
|
Round specimen clamping range |
Φ10-26, Φ26-45mm, Optional:Φ4-10,Φ45-55mm; |
|
Flat specimen clamping thickness |
0-30mm, Optional:30-40mm |
|
Compression plate dimensions |
Φ160mm |
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